Canon Speedlite 550EX Instructions Manual page 54

3. Setting the Master/Slave Channel
To prevent your master unil from firing another photographer's slave units,
four channels are provided to differentiate your slave units from unrelated
ones. The master unit and slave unit(s) in the same wireless flash system
must be set to the same channel No.
54
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~
.
4~-­
I ---=~~-~ITI
," " -
1
To sel the master unit's channel No.,
press the
<
SELISET
>
bulton and
select ~
.
• Pfe5$ing
ltIe
< SEL / SET;> button
d\a/Iges
IhI selee1ion
in !he tollowing
loop:
~ iIII""""
ErmI .....
-=-....
'' ' i i -,
(011) .....
2
Press the
<
+ )0
or
< -
>
button to set
the channel No. (1, 2, 3, or 4),
3
Press the < SEL I SET > bullon.
The
--=-
Icon al'ld channel NC). wil l be
displayed.
4
To set the slave unit's channel No. ,
press the
<
SELISET
>
bullan and
selecl ~ .
• Pressing
the '"
SElISET
>
bI.Iuon changes
Ihe selection in 1he following loop:
L '"---- ~
(011) " ,